part of cranial nerve formation glossopharyngeal nerve morphogenesis glossopharyngeal nerve formation CN IX biosynthesis GO:0021616 biological_process CN IX formation The process that gives rise to the glossopharyngeal nerve. This process pertains to the initial formation of a structure from unspecified parts. Various sensory and motor branches of the glossopharyngeal nerve supply nerve connections to the pharynx and back of the tongue. The branchial motor component contains motor fibers that innervate muscles that elevate the pharynx and larynx, and the tympanic branch supplies parasympathetic fibers to the otic ganglion.